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utl.NEMA.scad
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// Model: NEMA23
// Model: NEMA17
// Author: Bogdan Kecman
// Licence: GPL
//
// Usage:
// nema17(1); //nema17 double shaft
// nema17(); //nema17 siingle shaft
// nema23(1, 1); //nema23 double shaft cylinder
// nema23(1); //nema23 double shaft cube
// nema23(); //nema23 single shaft cube
// nema23(0,1); //nema23 single shaft cylinder
module nema23(has_back, is_cylinder){
mplate = 56.9; //mounting plate width
mplateH = 5.3; //mounting plate height
ringR = 38.10 / 2; //ring radius
ringH = 1.3; //ring thickness
shaftR = 6.337/2; //shaft radius
shaftH = 20.6; //shaft lenght
bodyL = 46.5; //46.5, 56.1, 77.7, 103.1, ...
bodyInnerCube = 37.6;
holeR = 5.21/2;
holeL = 47.14/2; //distance between hole centres
difference(){
union(){
//mounting plate
color([0.7,0.7,0.7]) cube(size = [mplate,mplate,mplateH], center = true);
//ring
color([0.7,0.7,0.7]) translate(v=[0,0,mplateH/2+ringH/2]) cylinder(r=ringR, h=ringH, center=true);
//shaft front
color([0.9,0.9,0.9]) translate(v=[0,0,mplateH/2+ringH+shaftH/2])cylinder(r=shaftR, h=shaftH, center=true);
if (has_back == 1){
color([0.9,0.9,0.9]) translate(v=[0,0,0-bodyL-shaftH/2]) cylinder(r=shaftR, h=shaftH, center=true);
}
//body
if (is_cylinder == 1){
color([0.1,0.1,0.1]) translate(v=[0,0,0-mplateH/2-bodyL/2]) cylinder(r=mplate/2, h=bodyL, center=true);
}else{
union(){
color([0.1,0.1,0.1]) translate(v=[0,0,0-mplateH/2-bodyL/2]) cube(size = [bodyInnerCube, mplate, bodyL], center=true);
color([0.1,0.1,0.1]) translate(v=[0,0,0-mplateH/2-bodyL/2]) cube(size = [mplate,bodyInnerCube, bodyL], center=true);
}
}
}
translate(v=[holeL,holeL,0]) cylinder(r = holeR, h = 2*mplateH, center=true);
translate(v=[-holeL,holeL,0]) cylinder(r = holeR, h = 2*mplateH, center=true);
translate(v=[-holeL,-holeL,0]) cylinder(r = holeR, h = 2*mplateH, center=true);
translate(v=[holeL,-holeL,0]) cylinder(r = holeR, h = 2*mplateH, center=true);
}
}
module nema17(has_back, is_cylinder){
mplate = 42.67; //mounting plate width
mplateH = 0; //mounting plate height
ringR = 22 / 2; //ring radius, can be 21.95/2
ringH = 2; //ring thickness
shaftR = 5/2; //shaft radius, can be 4.988/2
shaftH = 20.07; //shaft lenght
bodyL = 46.5; //25.3, 33.13, 34.7, 40.9, 47.0, ...
holeR = 3.5/2; //M3 or M4 or #4-40
holeL = 31.0/2; //distance between hole centres
difference(){
union(){
//ring
color([0.7,0.7,0.7]) translate(v=[0,0,ringH/2]) cylinder(r=ringR, h=ringH, center=true);
//shaft front
color([0.9,0.9,0.9]) translate(v=[0,0,ringH+shaftH/2])cylinder(r=shaftR, h=shaftH, center=true);
if (has_back == 1){
color([0.9,0.9,0.9]) translate(v=[0,0,0-bodyL-shaftH/2]) cylinder(r=shaftR, h=shaftH, center=true);
}
//body
if (is_cylinder == 1){
color([0.1,0.1,0.1]) translate(v=[0,0,0-bodyL/2]) cylinder(r=mplate/2*1.2, h=bodyL, center=true);
}else{
union(){
color([0.1,0.1,0.1]) translate(v=[0,0,0-bodyL/2]) cube(size = [mplate, mplate, bodyL], center=true);
color([0.1,0.1,0.1]) translate(v=[0,0,0-bodyL/2]) cube(size = [mplate, mplate, bodyL], center=true);
}
}
}
translate(v=[holeL,holeL,0-bodyL/2]) cylinder(r = holeR, h = bodyL+10, center=true);
translate(v=[-holeL,holeL,0-bodyL/2]) cylinder(r = holeR, h = bodyL+10, center=true);
translate(v=[-holeL,-holeL,0-bodyL/2]) cylinder(r = holeR, h = bodyL+10, center=true);
translate(v=[holeL,-holeL,0-bodyL/2]) cylinder(r = holeR, h = bodyL+10, center=true);
}
}